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Iron Mountain LON-1 London Data Center

PRJ-0964 · Site · Slough, England, United Kingdom

Record last updated Oct 28, 2026

Scope and capacity

Iron Mountain LON-1 London Data Center, also known as Iron Mountain LON-1, is a data center project in Slough, England, GB. Upgraded Slough facility with 8.75 MW of total power capacity across four data halls and approximately 10,400 square meters. Carrier-neutral facility with N+1 block redundancy, diverse fiber feeds, dark fiber and access to LINX. Customer utilization, private contract terms and unreported project financing remain outside the verified public record.

Headline: 8.8 MW Planned critical IT

Numbers refer to their stated physical boundaries and are not added together. Source dates, claim dates and record updates have different meanings. Missing dates and locators are not inferred.

Claims and exhibit sources

Jump to a claim (17)

Location context · LON-1 | Slough | England | GB

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 65778 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Lifecycle status · Operating

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 65779 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Reported capacity · 8.75 MW

Design · Iron Mountain LON-1 London Data Center (Project)

Claim 65780 · Recorded claim type: Design · Review: Approved · Claim date: Not stated

Headline treatment: Selected headline

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Capacity basis · Iron Mountain publishes 8.75 MW for the LON-1 facility record boundary.

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 65781 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Location context · LON-1 | Slough | England | GB

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89327 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Lifecycle status · Operating

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89328 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Reported capacity · 8.7 MW

Design · Iron Mountain LON-1 London Data Center (Project)

Claim 89329 · Recorded claim type: Design · Review: Approved · Claim date: Not stated

Headline treatment: Separate claim, not added to the headline

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Capacity basis · 8.7 MW is the Q2 2026 SEC-reported leaseable operating capacity. The larger marketed facility power or design boundary is retained as a separate assertion and is not presented as current operating IT.

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89330 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Operator or developer · Iron Mountain Data Centers

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89331 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Project location · Slough, England, GB

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89332 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Current lifecycle · Operating or in phased operation

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89333 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Capacity classification · It load

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89334 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Capacity basis · 8.7 MW is the Q2 2026 SEC-reported leaseable operating capacity. The larger marketed facility power or design boundary is retained as a separate assertion and is not presented as current operating IT.

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89335 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Customer utilization · Not publicly disclosed

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89337 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Source refresh date · 2026-08-29

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89339 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain LON-1 facility profile

    Iron Mountain Data Centers · Document date: Aug 28, 2026 · Primary

    Source reference: SRC-3728 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london/lon-1

Renewable energy matching · Operator states 100% matched renewable energy where applicable

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89340 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain London campus current profile

    Iron Mountain Data Centers · Document date: Aug 29, 2026 · Primary

    Source reference: SRC-4983 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.ironmountain.com/data-centers/locations/emea/london

Sec capacity comparison · Q2 2026 leaseable and development schedules reviewed

Actual · Iron Mountain LON-1 London Data Center (Project)

Claim 89341 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Iron Mountain Q2 2026 supplemental financial information

    Iron Mountain Incorporated / U.S. SEC · Document date: Aug 6, 2026 · Primary

    Source reference: SRC-4984 · Regulatory record · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1020569/000102056926000068/q22026srpfinal.htm

Counterparties and capital

Iron Mountain Data Centers · Developer · CMP-1123

This schedule captures public Cartis research. It is not a title, lien or legal-opinion report. Document page/section locators and claim review timestamps are included only when published; this version has no separate locator or claim-review-time feed.